Various changes:

- updated version to 0.6
- switched to argparse from getopts, renamed some arguments
- removed call-home from main.lua
- added --verbose option to show debugging
- added comments, fixed some grammar, updated README
- chmod 755'd the script so its runnable on POSIX
- checked with nodemcu 0.9.4 20141222
Merge pull request #3 from sej7278/master

Various changes